Sound-reproducing machine.



W. N. DENNISUN.

SOUND REPRODUCING MACHINE.

APPLICATION FILED MAH. I2. 1907` RENEWED IAN. 2(1.I9l5- Patented Aug.

4 SHEES-SHEEI I.

I N VE N TOR .d TTUR NE Y.

W. N. DENNISON.

SOUND REPRODUCING MACHINE.

APPLICATION min MAR. i2. 1901. RENEWED 1AN.20,1915.

1,150,346. Patented Aug. 17, 1915.

4 SHEETSSHEET 2.

W. N. DENNISN.

SOUND REPRODUCNG MACHINE. APPLICATION man mAn.12.1901. RENEwEn IAN. 20,1915.

1,1 50,346. Patented Aug. 17, 1915.

4 SHEETSSHEET 3.

W. N. DENNISON.

SUUND REPRODUCING MACHINE. APPLlcArloN msn MAR. 12, 19o?. Renewal) 1AN.'20.1915. 1,150,346.

Patented Aug. 17, 1915.

WTNESSES:

ATTORNEYP UNITED STATES PAlENT OFFICE.

N. DEXISON. GF HEBCHNTVILLE, NEW JERSEY, ASSIGNOR T0 VICTQR SOUND -RBLRODCNG H ACHINl-l rgeseaos of Letters Patent.

Patented Aug. 17. 1915.

ppication le Hawk l l. Eel-Lal Xo. 351,575). Renewed January 20. 1915. Serial No. 3,407.

To e frire-m it may cmu-ern Be it known that l, Wallons Dess-'r sox. of the borough o )forniremo-ille county of Camden. and State of Sew Jersey, have in'ented certain new :ind eseful Improvemns' in Solmd-Reproducing Machines, of which tire following is a full, clear, and com plee? disclosure.

This invention relates to Improvements m mind reproducing machines, in Wbich'sonnd unes sre impressed upon n lnid current by :noms moving in accordance with a sound record.

One obiee: of the invention is to combine in a ngle compact, convenient structure, meelnism for reproducing from a sound record nndnlarions in a current of sir, and marins for supplying n steady currentof purified oir to 'oe acted upon.

A further object is to provide a talking machine of be character above described n itli e sonnd box and connections, an an' purifier, a separator and a direct connected electrically driven air blower which will be self cooling and noisele in operation.

Further objects will be understood as the invention is 'further diSeloSed,-f.he as a whole being to provide a`ma e by which sounds will be reproduced from records with greater elearne, distinctne and aocumey than has heretofore been attained;

In the accompanying drawings Figure 1 is s vmentary front elevation of Ea machine constructed in accordance with this invention; Fig. 2 e side elevation of thesime; F' 5, 4 and 5 are enlarged fragnentary rations y inlen- 'gtndnal vertical section of etals of the same; andareperspectveviewsof detailso :the same; Fig. 8 is an enlarged central hbrizontal section of a vportion of the same; Fig. 9 a fragmentary end view of :x portion oi the aime; 1G a sectional view taken on line 10-10 of Fig. 9; and Fig. 11 a sectional viewtaken on line 11-11 of F 9;- f

Referring to the drawings, one embod ment of this invention comprise a cabinet 1, upon the top 2 of which is mounted o mutable 3 for supporting theusnal or any suitable sound record 4- Depending from a bracker 5 secured exteriorly to the rear side ofthe cabinet is a Swinging hollow tapering sound box arm 6 carrying at its inner end a sound bor arranged to cooperate with the sound record l. The swinging sound box am! opens npwardl at its larger end into s sound amplifying horn S crried by the bracket 5. Depending within the cabinet from the iop i. is the usual or any suitable motor or actuating mechanism 9 arranged to rotate the turntable 3. Themotor 9 is *preferably mounted 'upon tbefloor of the cabinet.l This compressor comprises, as shown in Fig. 3, a rotary blower 12 driven by an electric moigor 13, the armature'shaft 14 of the motor being extended to fom the driving shaft of the blowbr. The blower consists of a cylinder I5, prorided 'at its outer end with a removable cylinder head 16, and having an ecoentcally extended in'- ner end 17 forming bearings 18 for the smid motor xaft. Between the said 'Y 18 is anannnlar oil chamber 19 fed-by an oil duct 20.

The cylinder of the blower is arranged ecntricallv with respect to the motor shaft 14. and the cylinder is carried upon the end of the said shaft a piston Wheel 21 which is provided 'tb radial slots and with piston blades 22 sidably mounted in the slots.v The blower 12 is provided with anAinwarclly extending cylindrical casing 23 oorresponding in diameter to the diameter of the casing of the motor, and having an annular reoess' upon its inner edge to receive the edge 25 of the motor casing 26 and is' held against the motor sing by means of bolts '27. .Y Upon its up r side the blower .12-is provided with an e ongated inlet chamberz 28, :md with :in inlet duct 29 leading into said chamber from the motor chamber. The outer end of said inlet duct is reduced and provided with an orifice 30 of less aren than the transverse area of the main portion of the due The motor is entirely nclosed. and its outer end is covered with su air tight cap 31. provided with an outwardly extending lug 3;) having an inlet 5 duet 33 therethrough, over which is mounted an air filter 34, the details of which will be more fully described hereinafter. This arrangement and construction is such that all air that enters the blower mustl come first through the lter passing over the armature of the motor. and so on mto the Inlet duct 29 leading into the inlet chamber of the blower. Thus the air isfil-'Qi purified of all dust` and foreign matter before it enters the motor easing, and being drawn around the magnet coils and over the armature of the motor, asit passes through the n lotor, 1t has the very desirable eect of keeping the motor cool.

Inoperatingthismachmethemotorls run at a com tively high which, on account o the small opening into the inletduct of the blower, forms a vacuum in the inlet duct and inlet chamber of the blower. It has been fomit?l by thus oonstructme 0 and operating' e ower a much stdier How of air is obtained and the operation of the blower is rendered practieally noiseless.

80 For removing from the-arrnypil or similarmaertakeu bytheaumitsdis charge the bower, the pipe 35 ofthe said blower terminates-mn thmble 36 which is screw threadedtherem and leads into a separator 37. separatr 3T as shown in Fig. 4, comprises an -outertubeSShavinganupperclosed and rounded end 39 integral therewith and a lower end 40 formed separately and securely 4llfastened into the outer tube. Pamg the said lower end and held in lace vanoutwardl -J-Hn; ilange41 -ntrally and l of the outer tube and 5 tennimtes at its upper end in close proximitytotheupperroundedendoftheouter tube. Theinnertubeextends downwardly sbortd'tancebeyondtheendoftheour tnbeandsprovidewithaneulargedlower the said thimble 36 of the discharge pipe. hol-izo Uh the outer tubenearthe lowerexlfllmrdthereo istheoltrl pipe 44 terminating y in a ta endand projecting inwardly beyond the inner surface of the outertube. A hole 45 closed by: screwi is provided in the lower end of the separator whereby the separator may be emptied $0 For lizing the pressure of the air after it leav the separator 37, there is pro vided a preSnre equalizer, which is located above and upon one-side of the separator and is secured against. the under side of the 55 partition 11 and againstone side of the cabinet by metal bands 4T. This equalizer consists of a tank 4S provided wit-h a safety valve 49, an inlet pipe and en outlet pipe 51. The said inlet, and outlet pipes have tapered outer ends adapted to fitmto connections A short flexible tube 5'?. provided with terminal sockets 53 and 54 connects the outlet pipe 44 of the separator to the said inletpipe 50 of the equalizer.

For purify 0 the air after ithas left the pressure equalizer there is located the upper compartment of the cabinet, and conf nected to the outlet. pipe of the equalizer by a downwardly turned pipe 55 which paes through tbe partition of the cabinet, a second air filter 56, similar in construction to the filter hereinbefore mentioned. This air lter 56 comprises as shown in detailinFigs.5,6and,mioutertube56,

of the bar outside the bushings being equal to the width of the space desired between the bushings. When the bushings are positionedfwithin the cylinder the enctlks ofdhe barso onebnshingresta inst -e ves of the adjoining bushings tlgiabold the bushings in the desired relationship. Each end of these intermediate bushings is covered withawirescreenandthe ebetween the screens of adjoining bushings are filled with ootton or ther similar material for filtering the air. One end 57 of the cylinder is held in its position by screw threads, and is readily removable so that the filter may be takenapart for cleaning.

The outlet pipe :'9 of the filter extends for a short distance in the line of the axis of the filter horizontally and then turns at right angles, and terminates within the casing in a taper end adapted to fit in a socket 6T of a flexible pipe 70 which conducts the air to the sound box.

The details of the sound box used in this construction are shown in Figs. S, 9, 10 and 11 where it is seen that the sound box comprises a cylindrical casing T1 proded with an end TZ integral therewith and hav ing a tubular extension T3 coaxial thenL .with forming :in inlet for the sound box.

The opposite end of the cylindrical elsing Aal is provided Willi a cap or cover -l which :s screw threaded thereon by means v 1m internal thread T5 engaging in correa-cwi ing external threads upon the casing Tl;

The cap 74 is provided with a tubular en` tension 76 coaxial therewith and forming an outletfor the sdunu box. Y In an annular groovefoetween the sound box easing T1 and itsica'p 7l is held, in a fixed pition, a Hat circular di or .valve at which forms a seat for a valve 7S. The disk or valve seat- TT is provided cem trail)r with a series of parallel oblong rectangular ports T9. The valve 7S consists of a thin normally flat flexible plateiof metal and is provided with a series of slots 80 corresponding in width to the thicknes of tbe bri' ses S1 between tbe ports in the valve, seat. and the valve is so constructed and arranged that normally vthe bridges 82 between the ports of the valve just cover the ports in the valve seat.- g

The valve 7S is providedon ifs lower side withalug inanapertureinwhichisseeurely fastened tbe-reduced upper end 84 of astylnsbax-S. Thecapofthesoundboxis recessed to permit the free movement of the vlus bar, and the stylus is mounted to oscillaxe in a plane perpendicular to the valve upon a transverse spring member 86, which is secured atis ends to the stationary valve seat by means of screws S'and 8T'.

To hold the valve T8 yieldingly its seat under a. uid pressure a headed screw S8 loosely through a hole in the free end of th-valve and is threaded 'into the valve seat. A spring, or rubber washer 88' surroundsthesuew SSbetWeenthehead of the screw and the surface of the valve. A suitable recess is provided in the cap of the sound box to receive the screw and washer. `To bold the valve seat securely in position A@withrespect;tolillesoundboz:casingwllen thecap ofthesingisbeingscrewedinto position, a.pos`rtio ning pin 89 is provided extending:through the valve -seat and into the cap. 5 Within the casing, between the inlet side of the sound box and the valve, is situatedaconical air spreader and distributer 901 the outer diameter of which is slightly les than the inner diameter of the casing. This spreaderisuponacenlralstudlll supported by radial arms 92 carried by a ring 93 sn within the ease and againstthesaidfixedmemberof the valve. Within this ring 93 and against theradial arms 92, by means of an inner is s-...e\i a closely woven silk diaphragm 95- This diaphragm acts as a filter and pressure regulator.t

The sound box is comected at its inlet to alsup ly tube 96 by means of a U shaped tube i' 'the inner end of jvhich lits snugly ovgr the tnbular extension' 73, forming the in .leof the soundbox. The supply pi 96 enends-'rearwardlvfclose to the sound)e box 65 arm Giid substantially parallel to the axis thereof and is rigidly connectmi to the sound box arm in any suitable manner. The rear portion of this tube 96 terminates in one- .quarter of a u irn downwardly to receive che upwardly projecting end of the flexible tube 7i). At its outlet the sound box is connected to the taper sound arm 6 by means of a U shaped tube 98 the inner end of which lits snugly over the tubular extension 76 forming he outlet of the mundbox. The outer ends of these U tubes are pivotally connected to a sleeve 99, the said tube v9% extending through said sleeve and being provided with the collars 100 and 10i at opposite ends of the sleeve respectively to hold the tube ro- S0 tatively in position. A short inner tube 102 having an inner closed end 103 iii-s tightly within the outer end of said tube 98 thus forming an articulated jointbetween the supply tube, 96 and the sound box 73 and ijec beyond the end of said sleeve 99. esaidUtubeWtstight-ly overtheprofeeling' end of the said inner tube 102 and the said closed end 103 forms a partition betweenthelitubel'andtheutnbe. Upon one side ofthis partition the sleeve is provided with anl aperture over which is mounted the tapering arm 6 leading into the amplifying horn. Upon the other side of the partition the sleeve 'is provided 95 an a into which is inserted the endof l the supply tube 96. A are prrr vided through the the sleeve whieh regisher with the apertures in the sleeve when the sound box is in its operativeposition. When the sound box is raised iromtherecordinavertcalplanethe tubes revolve with respectA to the sleeves bringing their apertures out of register with the apertmes in thelsnpply pipe and the taparing arm thereby preventmg the of the current of air through the sound box. .This feature presents a convenimi't means of preventing a wase of air pregare when records are being changed and when 'the sound box is not in use.

In theoperation o f the md box, air is forced through thesupply pipe and U tube and intothe enensions'of the sound box here it strikes against the conical spreader and is-turned outwardly'r against the inner surface of the sound box passing around die periphery of the spreader, and then moving toward 'the centerthrugh the silk diaphragm into the .valve chamber, from whence it passes with a; uniform ressure into the valve. The movable member of the valve is vibrfed or flexed by' ofthe stylus actuated by the record so as to vary the amount of opening through which he air is permitted to pass, this operation producing sound waves in' the air as "it'iiies from the valve and reproiiucil'xge the 'waves im upon the record.

`urrentfor operating the machine .is

brought b v means of a {iexible conductor or cord 104 extending into the upper chamber of the raising to a fuse box 105 from whence it is led through suitable insulating 5 pipes to the starting switch 106 which is controlled by buttons and 10S prepoting through the side of the case, and *hence dounwardly through the partition l1 to the motor. Arranged upon one side of the bi- 1. net is the smul: 1G92 for winding the sald spring motor 9 which actuutes the turn table.

in the operation of this machine as a whole, the air is firstdniwn through the filter 34, and then through tbe casing of the electric motor 13 where the air not only keeps, the motor from overheating. as here tofore described, but is also incidentally slightly heated in return. This incidental heating of the air as it pm through the motor increases the hygrcopic p rty of the air which may result in a teu ency to keeep the sound reproducing meehanisu in the sound box dry and to produce other desimble results. v

From the interior of the, motor the an' 1s drawn through the orifice 30. duet 29 and inlet chamber 2Q and into the blower 12 from winch itis driven i'urdly into the 3o separator 3T where it is from oil or slmilar matter token up in its paage through the motor and blower-and is also freed from water or vapor. Frbm the sepa rator the air passes through the pipes 52 into the pmu-e equalizer 4S, and then pases through the pipes 51 and 55 into the second air filter 56 where the air is finally freed from any solid or liquid impurities that may have been rried through the o equalizer. g

The air thus pun'fed then passes through the pipe 59. the flexible pipe 70, and into the snppy tube B fixed on the sound box arm. From the supply tube 96 die air passes through the U tube 9?, through the sound box 'a' where sound waves are impressed upon the air as heretofore described. From the sound box the sound waves are delivered through the U tube 9S, 5o and into the tapering sound box arm 6, and are then delivered from the machine through the sosnd amplifier S.

There are many advantages due to the construction und arrangement of parts in this machine and some of these have been mentioned hereinbefore. B v having a filter -over the air inlet of the motor the greater part of the dust and foreign matter in the air is separated, :is beremfore described. from the, air before it enters the motor and Y the blower and this tends to insure the steady and smooth operation of these parts in particular and the machine as a whole.

By placinga separator between the blower and the equalizer it is possible to keep the motor and the blower sulliciently well lubricated to permit of their smooth and regular operation at the high speed necessary to insure the delivery of a substantially steady preure of air from the blower without the possibility of any of the oil being carried into the sound box.

The ressure eqalizer takes u and substanti y eliminates the slight uctuations in the pressure of the air current as it is delivered from the blower through the separator and also-substanally eliminates the fluctuations in the pressure that withoutan equalizer might be caused by the uneven ow of the current through the sound box, and makes it ble to deliver a smooth and substan y uniform pressure of air to the sound box during the reproduction of sound. The filter between the preure equalizer and thesound box guards against the remote chance of any foreign matter carried past the equalizer' and into the sound box.

B v this construction and arrangement the utmost protection is given to the sound box against the introdudzlon of any dust or oil or other forei mattenthe slightest amount of which mia t interfere seriously with the operation of the delicate sound reproducing mechanisn in the box. This construction also makes it possible to remove the foreign matter which collects in the separator,

' and filters or to repair or replace these parts withoutinterf with the adjustment of the sound reirlucing mechanism in, the sound box. In addition to the advantages hereinbeore pointed outthere are obviously other advantages which will be apparent to those skilled in the art. Although onlin shxgleembodiment of this 2 invention has been destm'bed herein, it is obvious that various modieations might be made in the t and construction of the various 'features ofv the device without departing from the spirit of invention or the scope of the appended claims.

Having lms fully escribed my invention what I claim and desire to protect by Letters Patent is: Y

.1. In a talking machine, the combination 31th a movabl: s021131 box provided with a v veporhan in ding' o; avalvearranged to substantially close said port, and means to actuate said valve to impreS sound wares upon a fluid current passing through said port, of means for causing a fluid current. to pa through slid port. and means supported independently of said sound box, for removing foreign matter from slid current before it passes into said sound box.

2. In a talking machine, the combination with a movable sound box provided with a vave polig-and including :i valve arranged to substantially close said port, and means to actuate said valve to impre sound w es 130 from said compnenr to seid soundreproe In wim whereof I have hereunto set my ducing means dandx neflndmg' d means slp- 'hand this 9th day of March A- D. 1907. ported indepen enfyo sai soundt-epro- ,Y y ducng means for removing impurities' from MURA DEX) ISON' 5 slid air, and means suppored indeendently W1tnesses:

of said sound reproducing means or equal- Ars'rbx B. Molinos, zing the presure of said air. Amaxmzx Pam mattlspctmtnsykebhhedtmemmbyamdngtheonmsioneref Patents,

Washington, D. c.'

Correction in Letters Patent No. 1,150,346.

It is herebycertified that in Letters Patent No. 1, 150,346, granted August 17, 1915,

l upon the application of Wilburn N. Dennison, of Merchantviile, New Jersey, for an -improvement in Sound-Reproducing Machines, an error appears in the printed specification requiring correcctiffi as follo'ws: Page 2,1iue 84, for the referencenumeral "56 read 56",- and that the said Letters Patent should be read with this corretion therein that the same may conform to the record of the case in the Patent Signed and sealed this 5th day of October, A. D., 1915.

R. F. WHITEHEAD, new @www gleam. 

